Proforged 108-10018 Greasable Front Left Upper Control Arm - 4WD 1,000,000 MILE WARRANTY. You can install our control arms with confidence knowing that every part we sell is backed by our industry-leading 1,000,000 mile limited warranty. We can offer this because our parts are engineered, tested, re-tested, and subject to strict quality control procedures - our quality is second to none. CRAZY STRONG CONTROL ARMS. Proforged control arms are built using some of the toughest steel and aluminum on the planet. Depending on the application, we choose a forging, casting, or stamping for strength and durability, and every fit surface is CNC machined for precision fit and finish. BUILT FOR PROFESSIONALS. Theres a reason why the most well-respected performance suspension brands use Proforged control arms - were fanatical about quality, performance, and durability. Professionals save time and money with our competitively-priced products that outlast inferior brands. Do the job with confidence - replace your worn components with the leader in performance control arms: Proforged. WHAT IS A CONTROL ARM? A control arm (also known as an A-arm) is the link between your frame and the steering knuckle or spindle - it is usually utilizes a ball joint, just like your hip, and it needs to be replaced as it wears out. A worn control arm causes poor handling and makes it difficult or impossible to achieve an alignment, which leads to rapid tire wear. Replacing your worn control arms gives a noticeable improvement in steering feel, handling, and safety. BUY WITH CONFIDENCE. Theres a reason that the most well-respected performance suspension manufacturers buy from Proforged: were the only brand of chassis parts that offers race-day performance at a price within your budget - and backs it up with a 1,000,000 mile limited warranty. Buy today and get your car, truck, or racecar back on the road and stronger than ever.